Niplate 600 is a medium phosphorus (5-9% in P) electroless nickel plating. Niplate 600 is the most widely used of all Niplate platings thanks to its high wear resistance, good corrosion resistance, and low cost.
The Niplate 600 coating is extremely versatile and is used to impart corrosion and wear protection to mechanical components in the automotive, hydraulic, and pneumatic sectors.
Due to its high hardness value, the coating plating offers protection against sliding wear, fretting wear, and erosion. Hardening treatments make it possible to achieve 1000 HV, equivalent to hard chrome. In fact, the treatment is employed in place of hard chrome platings for applications such as piston rods or cylinders, with the benefit, compared to hard chrome, that it can be applied on all alloys, and also offering better corrosion resistance.
The corrosion resistance of the Niplate 600 film makes it possible to protect brass parts against oxidation and corrosion such as valve bodies in the automotive and oxygen sector and forged brass parts, requiring high salt spray corrosion resistance.
Thanks to its hardness and microcrystalline structure, Niplate 600 offers high wear and fretting resistance.
Compared to the other Niplate treatments, considering the same coating thickness Niplate 600 is more economical thanks to the high efficiency of the deposition process.
Uniform and constant coating thickness over the entire surface, including holes; ideal for precision machined parts with tight tolerances and complex geometries.
All metals commonly used in mechanical engineering practice can be coated: alloys of iron, copper, and aluminium.
|Ni-P alloy, medium phosphorus electroless nickel plating|
|Product technical standards|
|ISO 4527 | NiP(7)|
|ASTM B733 | Type IV|
|NSF 51 certification|
|NSF 51 certification – Food equipment material.|
|RoHS compliant. No restricted substances present in amounts greater than the maximum tolerated concentrations.|
|REACH compliant. No SVHCs present in amounts higher than 0.1% by weight.|
|Stainless steel||Pre-treatment||Sand blasting|
|Case hardened steel||Pre-treatment||Sand blasting|
|Nitrided steel||Pre-treatment||Sand blasting|
|Brass, Bronze, Copper||Adhesion||★★★★★|
|Pure titanium and titanium alloys||Pre-treatment||Sand blasting|
|Nominal thickness, as required||Tolerance|
|3÷75µm||±10% (min. ±2µm)|
|Uniform thickness over the entire external and internal surface|
|Absence of point effect typical of galvanic coatings|
|Bright stainless steel metallic appearance that reproduces the morphology of the machined part|
|Option of matt finish (sand-blasted, shot-blasted, or grit blasted)|
|Hardening treatments may result in discolouration of the coating:|
• 260-280°C, white colour with possible localized yellow rings
• 340°C, iridescent blue-red colouring
|The surface hardness of Niplate 600 varies in relation to the hardening heat treatment carried out after deposition of the coating.|
|Hardness value||Heat treatment|
|700±50HV||Dehydrogenation at 160-180°C for 4h|
|800±50HV||Hardening at 260 -280°C for 8h|
|1000±50HV||Hardening at 340°C for 4h|
|Niplate 600 offers a high level of wear resistance, depending on the heat treatment carried out.|
|Guideline wear value, TWI-CS10||Heat treatment|
|The lower the number, the higher the performance – ASTM B733 X1 – Taber Abraser wear test – CS 10 abrasive wheels – 1 kg load|
|16±2 mg / 1000 cycles||Dehydrogenation at 160-180°C for 4h|
|12±2 mg / 1000 cycles||Hardening at 260 -280°C for 8h|
|9±2 mg / 1000 cycles||Hardening at 340°C for 4h|
|Dynamic dry friction coefficient value|
|0.4 ÷ 0.6 depending on the antagonist material|
|The corrosion protection of Niplate 600, assessed by means of the salt spray test, depends on the substrate material, machining, and finish of the part, and the applied film thickness.|
|Guideline corrosion resistance values||Substrate material|
|NSS to ISO 9227 – Thickness 20 μm – corroded surface < 5%|
|≥180 hours||Carbon steel|
|≥240 hours||Aluminium 6082|
|For applications requiring high chemical resistance, Niplate 500 should be used in place of Niplate 600. Niplate 600 anyway offers a good level of chemical resistance, especially in alkaline environments.|
|Guideline environmental compatibility values of exclusively the coating do not show corrosion protection of the substrate material. The overall performance of the coated part is highly dependent also on the type and quality of the substrate material. The actual environmental resistance must anyway be tested in the field.|
|Hydrocarbons (e.g. petrol, diesel, mineral oil, toluene)|
|Alcohol, ketones (e.g. ethanol, methanol, acetone)|
|Neutral saline solutions (e.g. sodium chloride, magnesium chloride, seawater)|
|Dilute reducing acids (e.g. citric acid, oxalic acid)|
|Acid oxidizing agents (e.g. nitric acid)|
|Concentrated acids (e.g. sulphuric acid, hydrochloric acid)|
|Dilute bases (e.g. dilute sodium hydroxide)|
|Base oxidizing agents (e.g. sodium hypochlorite)|
|Concentrated bases (e.g. concentrated sodium hydroxide)|
|Easily brazed using RMA, RA acid fluxes|
|Ferromagnetic||Dehydrogenation at 160-180°C for 4h|
|Ferromagnetic||Hardening at 260 -280°C for 8h|
|Ferromagnetic||Hardening at 340°C for 4h|
|Fusion point, solidus|